Where do I search for my acestors?

hannover-l
1

My ancestor Herman Heinrich Horstmann is from Neuenkirchen, Westfalen, Preussen, (Hanover). This is the info from a submission on FamilySearch.

Do I look for this family in North-Rhine-Westphalia or Lower Saxony where I saw the Province of Hannover?

Is anyone doing research on this family?
Herman Heinrich Horstman b: 8 apr 1821 Married Johanna Elizabeth Hess 6 feb 1850 in Rotterdam.

His parents are Friederich Wilhelm Horstman and Maria Henriette Bröckers.

Thank you,
Julie Dunkelberger

2

There are some Neuenkirchen in Germany, one of them is located near Steinfurt in Westphalia and an other near Melle in Lower Saxony former Kingdom of Hannover. Both was sometimes a part of Prussia. Both listed Horstmann and Bröcker addresses. Not easy to find the right place.
Regards, Werner Honkomp